Jobs
Biogas
Biogas is a gaseous renewable energy source[1] produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste, wastewater, and food waste. Biogas is produced by anaerobic digestion with anaerobic organisms or methanogens inside an anaerobic digester, biodigester or a bioreactor.[2] The gas composition is primarily methane (CH
4) and carbon dioxide (CO
2) and may have small amounts of hydrogen sulfide (H
2S), moisture and siloxanes. The methane can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used in fuel cells and for heating purpose, such as in cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat.[3]
After removal of carbon dioxide and hydrogen sulfide it can be compressed in the same way as natural gas and used to power motor vehicles. In the United Kingdom, for example, biogas is estimated to have the potential to replace around 17% of vehicle fuel.[4] It qualifies for renewable energy subsidies in some parts of the world. Biogas can be cleaned and upgraded to natural gas standards, when it becomes bio-methane. Biogas is considered to be a renewable resource because its production-and-use cycle is continuous, and it generates no net carbon dioxide. From a carbon perspective, as much carbon dioxide is absorbed from the atmosphere in the growth of the primary bio-resource as is released, when the material is ultimately converted to energy.
North Wales (Welsh: Gogledd Cymru), also known as the North of Wales (or simply the North, or in Welsh 'y Gogledd' in Wales), is a geographic region of Wales, encompassing its northernmost areas. It borders Mid Wales (or South Wales under some definitions) to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdonia National Park (Parc Cenedlaethol Eryri) and the Clwydian Range, known for its mountains, waterfalls and trails, located wholly within the region. Its population is more concentrated in the north-east, and northern coastal areas of the region, whilst significant Welsh-speaking populations are situated in its western and rural areas. North Wales is imprecisely defined, lacking any exact definition or administrative structure. For the public purposes of health, policing and emergency services, and for statistical,[1] economic[2][3] and cultural[note 2][4] purposes, North Wales is commonly defined administratively as its six most northern principal areas, but other definitions of the geographic region exist, with Montgomeryshire historically considered to be part of the region.
Those from North Wales are sometimes referred to as "Gogs" (from "Gogledd" – the Welsh word for "north");[5] in comparison, those from South Wales are sometimes called "Hwntws" by those from North Wales.
The region includes the localities of Wrexham, Deeside, Rhyl, Colwyn Bay, Flint, Bangor, Llandudno, and Holyhead. The largest localities in North Wales are the town of Wrexham and the conurbations of Deeside and Rhyl/Prestatyn, where the main retail, cultural, educational, tourism, and transport infrastructure and services of North Wales are located.
